The Resideo VC7930ZZ32 Modulating Actuator is a 24V control component designed to regulate valve positioning in HVAC hydronic systems. It operates by receiving control signals from a compatible controller and adjusting the valve opening to manage hot or chilled water flow. Used in fan coil units, heating systems, and hydronic air conditioning equipment, this actuator supports precise ... https://www.partshnc.com/resideo-vc7930zz32-modulating-actuator-24v